Universal fixture stem



C. H. HOCKEY. UNIVERSAL FIXTURE STEM. ArPLlcATlou mso rss. 24. 1920.

1,410,602. Patented Mar. 28,1922b UNITED STATES' PATENT oFFicE.

CLARENCE H. ROCKEY, OFCHICAGO, ILLINOIS.

'UNIVERSAL FIXTUB STEM.

Specification of Letters Patent. y. Patented )'[31-.28 1922.

Application led February 24, 1920. Serial No. 360,858.

To all whom it may concern.'

lie it known that l, CLARENCE li.' Rooxnr, a citizen of the United States, residing at Chicago, inthe county of Cook and 4State of Illinois, have invented a certain new and useful improvement in Universal Fixture Stems, of which the following is a speciiication.

rlhis invention is a device commonly called in the trade a hiclreyl7 for getting electric wires depending from the ceiling of a room into and out of a central stem of an electric light iixture, this with or lwithout an especially constructed novel stem. The object of the invention is to providea hickey proper of very simple and light construction which is nevertheless very strong and satisfactory in operation. fr further object is to provide a universal fixture stem which is very cheaply constructed, but which affords highly eflicient insulation.

The inventionvconsists in means for carrying out the foregoing objects and in many features of details of construction hereafter f more fully set .forth in the specification and claim. Referring to the drawings in which like numerals denote like parts throughout the several views, f y

Figure l is a vertical sectional detail view of mechanism illustrating all the features of this invention in its preferred form.

Figure 2 is a side view of the upper portion of the device of Figure l, certain parts being disassembled;

Figure 3 is a modified construction showing the same general view as in Figure l.

leferring particularly to Figure 1, the mechanism is shown applied to a wall and ceiling 1 0, having the usual cut out box 12 secured thereto in the center of which cut out box is a depending screw threaded stem lll for the reception of the fixture stem and at one side of which is the usual perforation 16 for the entrance of the electric wire 18 which is to be conducted into the fixture stem proper.

In constructing the combined universal stemand hiclrey of this invention shown in Figure 1 an outer metallic tube 2O of sub stantial length is provided7 the same being notched at its upper edge in two or` more U-shaped notches or recesses 22 clearly appearing in Figure 2. vThe outer end of this tube 22 is provided with screw threads 24 engaged by circular collar 26 of suiicient longitudinal thinness so that when in place as shown in. Figure l there is ample space in the notches 22 below this collar for the wire 18 to pass through as shown. The inner circumferential end of the tube 20 is provided with screw threads interiitting with the threads on stud 14, these sets of threads being designated in Figure 1 by numeral .ln View of the fact that the collar or nut reinforcesl the extreme end of tube 20 it is obvious that when the pipe is screw threaded on to the stud lt the portions of tube adjacent to notches 22 do not yield and spring sidewise as would be the case were the collar 26 absent with corresponding slipping and angular distortion of the tube 20 with reference to the ceiling. The lower portion of the tube 2O is provided with perforations 30. Inside of tube 20 and spaced apart from it but extending only up to the point below the notches 22 is an inner metallic tube 32 also provided with perforations 84;. This tube 32 is held in spaced position from the interior of the tube 2O by insulating composition 36 of such a character that in the process of manufacture will close into the perforations ESO and 34 heretofore referred to with the result that afterthe composition has hardened the tubes are held in spaced relation with reference to and retained against the longitudinal movement, one with the other.

Surrounding the lower portion of inner tube 32 and held in place by anv angular eny largement thereof 38 which extends below the end of tube 3() is an insulating collar 40 which abuts against the lower end of tube 30 and serves from time to time as a rest for the enclosing case or cap 42 of usual construction which is adapted to rest in the dotted line position of Figure 17 in the fixture being assembled and it is adapted to be moved upward into engagement with the ceiling 10 and thebox 12 when the wiring is completed and the job is'finished-this in the obvious manner'without novelty.

The lower end of member 38 of tube 32 is finished off by any suitable means withoutl tion the upper or hiekey portion of the device is exactly the same as before, the only difference being that the pipe 5() Correspondingl to the hiekey portion of pipe 2O is not made Continuous with the fixture stem below but on the other1 hand terminates at the Washer 52. The lower end at this short pipe 50 is screw threaded at 54- and is ended by e short piece oit metal pipe 5G whieh is secured by pins or any other suitable means to en insulating;` tube G() abutting against Waeher 52 to hold it in plane. This insulating tube 60 at its lower end is again proif'ided with an internal metal tube G2 held in place by e pin Gel: and provided on its lower end with screw threads 6G for the reception of the cap 46, Figure l. In `the use of this modi'lied form oil device a. short pipe 50 and Wall attaehing` mechanism constituting the hickey are irst put in place as in Figure l Whereupon the iixtuie stem mechanism constituting;l the parte from the Screw thread 54 to the bottom of the iigure is inserted in place in the obvious manner.

The details ol the modified structure oi igure are reserved `tor and claimed in my eopending application, Serial No. 519,937, filed December 5, 192i.

Having thus described my invention what claim as new and desire to secure by Letters latent is i uni versnl fixture comprising eoneentrie spaced apart tubes, each extending beyond one end of the other, insulating material .in the space between the two gether by enteringl perforations in the adja- Cent Walls ot the respeetire tubes, means 'For uiten-hing' the end olf one tube to a wall lixture.. :ind ineens for attaehing` a linishing device to the extendii'ig end ol1 the other tube.

in witness whereof, I have hereunto sul scribed my name in the preeenee olE two witneSSeS.

CLARENCE H. HOCKEY.

lllitnesses ANNA ROSENTHAL, .DwiGHT B. CHEEVER.

securing them to J 

